Abrading-disk.



UNITED STATES PATENT OFFICE.

JOSEPH A. HICKEY, 0F PHILADELPHIA PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOFRANCIS BANCROFT, OF MERCHANTVILLE, NEW JERSEY. v

ABRADING-DISK.

Specification of Letters Patent.

Patented Jan. 14, 1919.

Application filed May 9, 1916. Serial N 0. 96,302.

To all whom it may concern:

Be it known that I, JOSEPH A. HICKEY, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented certain new and useful Improvements in Abrading- Disks, ofwhich the following is a specification. 4

One object of my invention is to provide an abrading disk which not onlyis simple in construction but is extremely efficient in operation. Inabrading disks as heretofore constructed the abrading surfaces have been7 apparent from such description.

In order that my invention may be more readily understood and itsadvantages more fully appreciated reference should be had to theaccompanying drawing in which I have illustrated certain convenientforms of embodiment thereof, but it will be understood that changes inthe details of construction may be made within the scope of the claimswithout departing therefrom.

In the drawings Figure 1 is a top plan view of a portion of an abradingdiskconstructed in'accordance with my invention;

Fig. 2 is i a transverse sectional view thereof;

Fig. 3 is a transverse sectional view of the parts enlarged taken on theline 33 of Fig. 1; and

Fig. 4 is aview corresponding to Fig. 3 but showing a modification ofthe construction.

Referring to'the drawings, 1 designates a base of the disk of metal or.other suitable material to which an attaching or holding plate 2 ofmetal or suitable material is secured by means of screws 3. Intermediatethe base 1 and the holding or attaching plate 2 a. backing of hardrubber or other suitable material 4 is provided. The screws 3 not onlypass through the plate 2 but also through the intermediate sheet ofshock absorbing material 4. The attaching or holding plate 2 is providedwith a series of openings 5 the lower ends of which are enlarged asindicated at 6 leaving the opening at its upper end 7 of less diameter.These portions of the respective openings of different size areconnected with each other by an annular inwardly inclined shoulder 8.

The grinding elements comprise plugs 9 consisting of suitable abradingmaterial, the lower ends or bases of which plugs are constructed so asto conform to the respective openings 5, that is to say, the said plugsat their lower ends are of greater diameter than the remainders or upperportions thereof. Such portions of different diameters are connectedwith each other by an annular shoulder 10 which bears against orcontacts with the annular shoulders 8 of the attachmg or holding plate2. The plugs are each provided with a blind opening or recess 11 so thatthe upper portions of the said abrading elements are annular as shown.It will be understood, however, that instead of the openings 5 and theplugs 9 therein bein circular in transverse section they may e of anyother suitable shape as may be desired.

Instead of forming the plugs of the constructionshown in Figs. 1, 2 and3 of the drawing the plugs may be of truncated cone shape. In Fig. 4 Ihave shown plugs 12 which are of truncated cone shape, the bases ofwhich are located in correspondingly shaped openings 13 in the attachingor holding plate 2 by means of which they are attached to the base 1. Inthe construction shown in Fig. 4, as in the construction shown in Figs.1, 2 and 3, an intermediate sheet of hard rubber or other suitablematerial 4 is employed. The plate 2 and the sheet 4 are secured to thebase 1 by means of screws 3 as in Figs. 1, 2 and 3. The openings 14extend entirely through the plugs 12 although it will be understood thatdepressions or bllnd openings only may be provided.

It will be understood that the disk,'which comprises the parts 1, 2, 3and the grinding elements consisting of the plugs, is secured in anysuitable manner to a rotating element of a machine.

By reason of the fact that during the rapid rotation of. the disk whenit is in use the air circulates freely between the plugs, which aresituated in spaced relation to each other, they are prevented from beingtoo greatly heated. Furthermore, the depres- 1 ments projecting sionsand pores of the said plugs which open upon the active or operativesurfaces thereof donot become filled andclogged with the material beingoperated upon and by reason thereof do not become hard and smooth. Theresult is that the elements retain their capacity for cutting rapidlythe material which is being abraded thereby. The material which may becut or detached from the article being operated upon falls between thesaid plugs or may fall into the openings 11 or 14 thereof, as the casemay be, but is not pressed or ground into the depressions and pores asis the case with flat abrading or rinding disks in which the grindingsuraces are continuous.

I claim:

1. An abrading disk comprising a base member, an attaching plate havinga plurality of holes extending therethrough, the outer ends of saidholes being of less diameter than the inner ends thereof, grinding plugssituated insaid holes, the base portions of said plugs conforming to andfitting the said holes, and means for securing the said base member andthe said attaching plate together, the said base member operating at alltimes to retain the said plugs in position in said holes.

2. An abrading disk comprising a plate having aseries of holes thereinthe diame ters of the outer ends of said holes being less than thediameters of the inner ends thereof, abrading elements situated in thesaid holes the abrading ends of said elebeyond the front surface of saidplate and the opposite ends thereof being substantially flush with theinner surface of said plate and the base end portions of said elementsfitting the said holes, and means independent of said plate and saidelements operating to secure and retain the said elements in position insaid holes.

3. An abrading disk comprising a. plate member having a plurality ofopenings therein the outer ends of said openings being of less diameterthan the inner ends thereof, a plurality of abrading elements situatedin said openings the base end portions thereof conforming to and fittingsaid openings and the outer abrading end pf each of said elements beingprovided with depressions therein whereby each element is formed with anannular abrading surface, and means for securing and retaining the saidelements within the said holes.

4. An abrading disk comprising a relatively thick base member, anattaching metallic plate having a plurality of holes extendingtherethrough, the outer ends of said holes being of less diameter thanthe inner ends thereof, grinding plugs situated in the said holes thebase portions of said plugs conforming to and fitting the said holes, asheet of compressible material situated between the said base member andthe said plate, and means for securing the said base member, plate andcompressible sheet together.

5. An abrading disk comprising a base member, an attaching member havinga plurality of holes extending therethrough, said holes respectivelyhaving one portion larger than the other which portions are separated bya shoulder, plugs situated in said holes, said plugs respectively havingone end portion larger than the remaining portion, said portions beingseparated'by a shoulder, the largerportion and a part of the smallerportion of said plugs fitting the corresponding parts of the said holesrespectively, the shoulders upon the said plugs contacting with theshoulders in the said .holes, and means for securing the base member andattaching plate together, the said base .member operating to hold theplugs in position.

In testimony that I claim the foregoing as my invention, I have hereuntosigned my name this 22d day of December, A. D. 1915.

JOSEPH A. HICKEY.

